Details, datasheet, quote on part number: ISL4223EIR-T
CategoryAnalog & Mixed-Signal Processing
DescriptionQFN Packaged, +/-15kV Esd Protected, +2.7V to +5.5V, 150Nanoamp, 250kBps, RS-232 Transmitters/receivers
CompanyIntersil Corporation
DatasheetDownload ISL4223EIR-T datasheet
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Features, Applications

The Intersil ISL422XE devices are to 5.5V powered RS-232 transmitters/receivers which meet ElA/TIA-232 and V.28/V.24 specifications, even at VCC = 3.0V. Additionally, they provide 15kV ESD protection (IEC61000-4-2 Air Gap, and Human Body Model) on transmitter outputs and receiver inputs (RS-232 pins). Targeted applications are PDAs, Palmtops, and hand-held products where the low operational, and even lower standby, power consumption is critical. Efficient on-chip charge pumps, coupled with manual and automatic powerdown functions, reduce the standby supply current a 150nA trickle. Tiny x 5mm Quad Flat No-Lead (QFN) packaging and the use of small, low value capacitors ensure board space savings as well. Data rates greater than 250kBps are guaranteed at worst case load conditions. The a 1 driver, 1 receiver device and the a 2 driver, 2 receiver device that, coupled with the 5x5 QFN package, provide the industry's smallest, lowest power serial port suitable for PDAs, and hand-held applications. The 5x5 QFN requires 40% less board area than a 20 lead TSSOP, and is nearly 20% thinner. The ISL422XE features an automatic powerdown function that powers down the on-chip power-supply and driver circuits. This occurs when an attached peripheral device is shut off or the RS-232 cable is removed, conserving system power automatically without changes to the hardware or operating system. It powers up again when a valid RS-232 voltage is applied to any receiver input. Table 1 summarizes the features of the ISL422XE, while Application Note AN9863 summarizes the features of each device comprising the 3V RS-232 family.


Available in Near Chip Scale QFN (5mmx5mm) Package which is 40% Smaller than a 20 Lead TSSOP ESD Protection for RS-232 I/O Pins 15kV (IEC61000) Meets EIA/TIA-232 and V.28/V.24 Specifications 3V RS-232 Compatible with VCC = 2.7V On-Chip Voltage Converters Require Only Four External 0.1F Capacitors Manual and Automatic Powerdown Features Receiver Hysteresis For Improved Noise Immunity Guaranteed Minimum Data Rate. 250kBps Wide Power Supply Range. Single to +5.5V Low Supply Current in Powerdown State.150nA


Any Space Constrained System Requiring RS-232 Ports - Battery Powered, and Portable Equipment - Hand-Held Products (GPS Receivers, Bar Code Scanners, etc.) - PDAs and Palmtops, Data Cables - Cellular/Mobile Phones, Digital Cameras

Technical Brief TB363 "Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices "Technical Brief TB379 "Thermal Characterization of Packages for ICs" Technical Brief TB389 "PCB Land Pattern Design and Surface Mount Guidelines for QFN Packages"


PART NO. ISL4223EIR ISL4223EIR-T TEMP. RANGE (oC) to 85 PACKAGE 16 Ld QFN 16 Ld QFN Tape & Reel 20 Ld QFN 20 Ld QFN Tape & Reel PKG. NO. L16.5x5 L20.5x5

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2003. All Rights Reserved

PIN VCC V+ VGND C1C2+ C2TIN TOUT RIN ROUT INVALID System power supply input to 5.5V). Internally generated positive transmitter supply (+5.5V). Internally generated negative transmitter supply (-5.5V). Ground connection. External capacitor (voltage doubler) is connected to this lead. External capacitor (voltage doubler) is connected to this lead. External capacitor (voltage inverter) is connected to this lead. External capacitor (voltage inverter) is connected to this lead. TTL/CMOS compatible transmitter Inputs. 15kV ESD Protected, RS-232 level (nominally 5.5V) transmitter outputs. 15kV ESD Protected, RS-232 compatible receiver inputs. TTL/CMOS level receiver outputs. Active low output that indicates if no valid RS-232 levels are present on any receiver input. FUNCTION

FORCEOFF Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (see Table 2). FORCEON EN Active high input to override automatic powerdown circuitry thereby keeping transmitters active. (FORCEOFF must be high). Active low receiver enable control.


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